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3 Sheets-Sheet 1.

'Il I BLEVATOR.

Patented Dee. 26, 1893.

J. P. BUGKLEY.

(No Model!) (No Model.) 3 Sheets-Sheet 2.

J. P. BUGKLEY. ELEVATOR.

No. 511,679'. Patented Deo. 26, 1893.

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ttorney.

(No Model.) 3 Sheets-Sheet 3.

J. P. BUGKLEY. ELEVATOR.

N0. 511,679. Patentednec. 26, 1893.

151 ven io 7.*- "A" rares nfrieivir Ochten@ JOHN P. BUOKLEY, OF NEW' ORLEANS, LOUISIANA, ASSIGNOR OF ONE-THIRD TO JOHN G. KOSTMAYER, CHARLES SOHOENEOK, AND OTTO HELMANN OF SAME PLACE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 511,679, dated December 26, 1893.

Application tiled March Z8, 1893. Serial No. 467,985. (No model.)

To @ZZ whom t may concern:

Be it known that I, JOHN P. B UoKLEY, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of 5 Louisiana, have invented certain new and useful Improvements in Elevators; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part [o of this specication, and to the figures of reference marked thereon.

This inventionl relates to hoisting appliances for elevator work and similar purposes and has for its object to reduce the friction, 15 to increase the power and speed of the hoistlng devices, and to provideasimplified means for automatically controlling the movements of an electrically operated elevator, as hereinafter more particularly set forth.

The invention consists in the novel features of construction and new combinations of parts 1n an elevator as hereinafter described and claimed.

In the annexed drawings illustrating the in- 2 5 vention-Figure 1 is a partly sectional side elevation of my improved elevator hoisting mechanism. Fig.2is a plan of the same, with th'e upper portion ofthe frame removed. Fig. 3 1s a detail plan view showing a portion of 3o the carriage, its nut and actuating screw, and one of the cable sheaves. Fig. 4 is a partly sectional 4side elevation of one end of the hoisting apparatus. Fig. 5 is a vertical transverse section through the line :c fc of Fig. 1. 35 Fig. G is a section through thelineyfy of Fig. 4. Figs. 7, 8, 9 and 10 are detail views of side, top and bottom pieces of the carriage. Fig. 11 is a view of one of the end pieces of the carriage. Fig. 12 is a view of the resistance 4o controller. Fig. 13 is an enlarged elevation of the air compressor-piston. Fig. 14 is a bottom plan of the same. Fig. 15 is a partly sectional side elevation showing the application of the resistance controller to the screw shaft 45 of the hoisting mechanism.

The numeral 1 designates the base or bottom rail and 2 the top rail of a horizontally arranged frame in which the hoisting mechanism is supported.Y The top rail 2 is supported by pillars 3 and 4 at opposite ends of the. frame.

In the pillar 3 at one end of the frame is a bearing through which is passed one of the cylindrical ends 5 of a screw shaft 6 that has its other cylindrical end 7 supported in a socketed arm or bearing S projecting inwardly from the pillar 4 at the other end of the frame.

Between the base 1 and top rail 2 and surrounding the screw shaft G is a carriage 9 with which the screw shaft is engaged. This carriage comprises vertical end pieces 10, Figs. 1,3, 5, and 1l,that are provided with recesses. 11 at top, bottom, and both sides for connection with top and bottom pieces 12, Figs. 9 and 10, and side pieces 13, Figs. 7 and S, by which the carriage is completed. The carriage end pieces 10 are centrally perforated for passage of the screw shaft 6 with which they are engaged, and they are also perforated or recessed to receive the cylindrical ends of four anti-friction rolls 14 that are each provided with a series of annular V grooves to engage the screw shaft and form a sectional anti-friction nut thereon. These circumferentially grooved anti-friction rolls 14 are adjusted and held within the carriage by means of set screws l5, Figs. 1, 2 and 3, at one end. As shown in Fig. 1, the grooved rolls 14 carry at their opposite ends steel plates or hardened surfaces 16 having annular grooves for reception of anti-friction steel balls 17 that also bear in similarly grooved surfaces of steel plates 1S attached to the inner ends of the set screws 15 or steel plates 19 in the opposite end of the carriage, for the purpose of taking the thrust of said rolls in both directions. The end thrust of the screw shaft 6 is sustained or supported by anti-friction balls 20 arranged in an annular series between a collar 21 on said screw shaft and a flanged end or shoulder 22 of the socket bearing S in which one end of the screw shaft is received.

The top and bottom plates 12 of the carriage 9 are each provided with a longitudinal guide rib 23, Figs. 2 and 5, preerablyVu shaped in cross section and engaged in similarly shaped longitudinal grooves of the base 1 and top .rail 2 for the purpose of guiding the carriage 1n or along the frame. Each carriage slde piece 13 is provided with a laterally projecting shaft or stud 24 on each of" which is loosely mounted one of the sheaves 25 for engaging the cable or cables 26 through which the elevator car is hoisted and lowered.

In the pillar 4 at the farther end of the frame is a bearing for a rotary sleeve or tubular shaft 27, Figs. 2 and 4,to which is secured a sheave 28for the hoisting cable 26 and a bevel gear 29 meshing with a bevel pinion 30 that is fast on the screw shaft 6 and through which the said sheave 28 is positively actuated. A shaft 31 extended through the sleeve 27 supports on the other side of the machine frame a sheave 32 with which the hoisting cable is also engaged. The under part of the base or bottom rail 1 is recessed near one end, as shown in Figs. 1 and 4, to afford space for a horizontally arranged sheave 33 mounted on a vertical shaft or stud 34 that is supported in the base piece.

The hoisting cables 26 work in a pair and are attached at one end to the base 1 of the frame and at the other end to the elevator car. After passing several times around one of the sheaves 25 and the sheave 32 on one side of the frame the cables are guided by the horizontal'sheave 33 to the opposite side of l the frame, where they are wound around the sheaves 28 and 25, and then conducted from the sheave 28 to the elevator. 'The sheaves are arranged on both sides of the frame, as shown, for the purpose of equalizing the strain and to provide means whereby a great length of cable can be drawn in or let out rapidly. By Ineans of the bevel pinion 30 on the screw shaft 6 meshing with the bevel wheel 29 that is fast on the sleeve or tubular shaft 27 to which the sheave 28 is secured the power imparted to the screw shaft is transmitted directly to said sheave in such a way as to greatly assist the operation of the hoisting cables.

I prefer to apply power to the screw shaft 6 from an electric motor 35, Figs. 1 and 2, connected to the cylindrical end 5 of said shaft. The rotation of the screw shaft 6 in engagement with the anti-friction nut or grooved rolls 14 of the carriage 9 causes said carriage to move along the screw shaft either toward or from the sheaves 28 and 32 that are nearest the elevator. If the screw shaft 6 is turned in such direction as to cause the carriage 9 and attached sheaves 25 to move away from the sheaves' 28, 32, the hoisting cables willbe thereby drawn in so as to raise the elevator car; but if the carriage 9 and sheaves 25 are moved toward the sheaves 28, 32, thus letting out the hoisting cables, the car will be lowered.-

For-the purpose of controlling the speed of the. electrically actuated screw shaft 6 the cylindrical portion 5 of said shaft may rest loosely in a stationary tubular shaft or bearin g 3ahavin gloosely mon nted thereon a sleeve 36, Figs. 12 and 15, provided with arms 37, that carry a ring 38 to which is attached a segmental armature 39 which is adapted to be drawn into a resistance coil 40 when magnetized by an electric current passed through said coil. From the eccentric 41 on the sleeve 36 is extended a connecting rod 42 to a piston head 43 in an air compressing chamber 44, so that the armature 39 when attached will move slowly into the resistance coil, thereby 1mparting a slow movement to the ring 3.8 on which the armature is supported. The piston head 43 is provided with a ap valve 45 on its under side. When the armature is attracted by the coil 40 a roller 46, mounted on the ring 38, is carried successively against a series of contact plates 47 of a rheostat 48 through which a variable resistance is obtained. The roller 46 is mounted on a stud carried by 'a sleeve 49 that is loosely mounted on the ring 38 and connected with a spring 50, arranged to press the roller against the contact plates of the rheostat. If the current through the coil 40 is cut off the ring 38, armature 39, and roller 46 will be returned to normal position by a counterbalance weight 51 attached to the ring.

On the cylindrical portion 5 of the screw shaft 6 is an eccentric 52 having a connecting rod 53 that actuates a piston head 54 in an air chamber 55 which is provided with an air passage 56, Fig. 15, controlled by a disk valve 57 carried by an arm 58 suspended from an eccentric 59 on the sleeve 36 that supports the armature ring.

By means of a switch in the elevator car, the current is sent through the coil 40 thereby attracting the armature 39 and imparting a slow movement to the ring 38 which carries the roller 46 over and against the contact plates of the rheostat, a quick movement vof the ring being prevented by the compressor or governor 43 so that the rollerwill throw ont the resistance slowly. Meanwhile the eccentric 59 and attached disk valve 57 close the passage 56 leading from the compressing chamber 55 and will thus enable the piston 54 to act as a brake to retard the rotation of the screw shaft 6 and thereby control the movements of the elevator car without shook or jar.

It is obvious that the set screws 15, which are shown in Figs. 1 and 2 at only one end of the carriage 9, lnay be employed at both ends of the carriage if desired. The rollers 14 are not screw threaded but are provided with annular V shaped grooves that work in the threads of the main operating screw.

Vhile I have shown an electric motor for actuating the screw shaft 6 it will be understood that said shaft may be operated by any other convenient or suitable power.

What I claim as my invention is 1. In hoisting mechanism for elevators, the combination of a horizontally movable carriage, a frame or guideway for said carriage, a nut mounted in said carriage, a screw-shaft IIO extended horizontally through the carriage in engagement with said nut, cable supporting sheaves attached to the carriage on opposite sides of its supporting frame or guideway, a shaft mounted transversely in one end of the frame and having a sheave on one side of said frame, a sleeve surrounding said shaft and carrying a sheave on the opposite side of the frame, a bevel gear mounted on said sleeve a bevel pinion mounted on the screw shaft and meshing with said gear, an intermediate horizontally arranged sheave, and a hoisting cable wound on the sheaves at opposite sides of the frame and guided from one side to the otherby the horizontal sheave7 substantially as described.

2. In hoisting mechanism for elevators, the combination of a horizontal frame or guideway, two stationary sheaves mounted on opposite sides of said frame, a horizontally eX- tended screw shaft journaled in said frame and geared with one of said sheaves, a horizontally movable carriage supported in the frame and having a nut engaged with the screw shaft, sheaves mounted on and carried by opposite sides of the carriage, a horizontally arranged sheave mounted intermediate the two stationary sheaves, a hoisting cable wound on the oppositely arranged sheaves, and means for rotating the screw shaft to move the carriage toward and from the stationary sheaves, substantially as described.

3. In hoisting mechanism for elevators, the combination of two oppositely arranged stationary sheaves, an intermediate horizontally arranged sheave, a horizontally movable car riage having a sheave supported on each side, a screw shaft for actuating said carriage to move it toward and from the stationary sheaves, gearing that connects said screw shaft with one of the stationary sheaves, a hoisting cable, an electric motor for driving the screw shaft, an air-brake, and a rheostat of variable resistance for controlling the rotation of the screw shaft, substantially as described.

4. In hoisting mechanism for elevators, the combination of a horizontal screw shaft having an anti-friction thrust bearing at one end, two oppositely arranged stationary sheaves one of which is geared with said screw shaft, an intermediate horizontal sheave, a horizontally movable carriage surrounding the screwshaft, a series of grooved rollers mounted in said carriage in engagement with the screw shaft and forming a nut, anti-friction thrust bearings at the ends of said rollers, sheaves supported on opposite sides of the carriage, a hoisting cable and a motor for the screw shaft, substantially as described.

5. In hoisting mechanism for elevators, the combination of a horizontally movable carriage having a nut mounted therein, a horizontal screw shaft extended through the carriage in engagement with said nut, sheaves supported by opposite sides of the carriage and movable therewith, two stationary sheaves one of which is geared with the screw shaft, a horizontal guide sheave intermediate the two stationary sheaves, a hoist-ing cable wound on the oppositely arranged sheaves, and a motor for rotating the screw shaft to move the carriage toward and from the stationary sheaves for the purpose of letting out and drawing in the cable, substantially as described.

6. In hoisting mechanism for elevators, a main screw having V shaped threads in combination with a traveling carriage having rolls provided on their outer surfaces with annular V shaped grooves engaged with the V shaped threads of the main screw to move forward or backward according to the direc tion in which the screw may be turned, substantially as described.

7. An elevating apparatus comprising a main screw provided with V shaped threads, l

and a traveling carriage engaged therewith,

said carriage having rolls provided with V shaped grooves for working in the threads of the screw for the purpose of moving the carriage, substantially as described.

S. An elevating apparatus, comprising a main screw, a traveling carriage engaged with the screw, an electric motor, an air brake attached to the main screw, and a controller operating in connection with the air brake for automatically controlling the current of electricity to the motor, substantially as described.

9. vAn elevating apparatus, comprising a screw shaft, an electric motor operating the screw-shaft, an aircushion, and a controller controlled by the air cushion for automatically regulating the current of electricity to the motor, substantially as described.

In testimony whereof I have hereunto subscribed my name in the presence of two wit HGSSGS.

JOHN I). BUCKLEY.

Witnesses:

JOHN G. KASTMAYER, ROBERT E. Rrus.

IOO 

